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Stellar Occultation by (148171) 1999 YC3 on 2026-09-20 (21:11:22 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
 Occultation UUID [and db] : 309584a0-d9b1-11f1-43f3-87d5f4f742c4 [observed]

 Occultation Date + Time   : 2026-09-20 at 21:11:22 UT +/- 0.0 min  [1]
 Object Designation        : (148171) 1999 YC3
 Star Designation          : GDR3 2712542636522531584
 Star Coordinates (ICRF)   : RA = 22 50 01.0873, DE = +07 19 57.558  [2]
 Star Magnitudes           : G = 10.78 mag, RP = 10.34 mag, BP = 11.06 mag
 Object Magnitude          : V = 17.26 mag
 Estimated Magnitude Drop  : 6.5 mag
 Estimated Max. Duration   : 0.2 sec
 Speed of the shadow       : 10.9 km/s
 Object Mean Diameter      : 2.5 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 1.0583 arcs/min @ PA = 293 deg
 Horizontal Parallax       : 10.3230 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 59° (sunlit = 69%), Sun = 162°
 Cross-track uncertainty   : 4.7 mas = 2 km = 1.16 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL30
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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